JELLY! is full DAY in Co-working experience opened to anybody. Jellies are now happening every two weeks, switching between four co-working spaces in Prague.
My experience show then effective support must be SIMPLE and TARGETED, this is idea of actively supporting propagating of existing co-working places:
In Czech Republic we have as part of TheWORKs social network program called Jelly!, which propagate co-working by organizing regular FULL DAY free attend meetings when anybody go and can work one full day. EC can sponsor (compensate to co-working centers) this time. Doing it for example 2 days per month can be less administratively intensive, them personal support of individual web entrepreneurs.